Patent US2706618A successfully refreshed from Google Patents.
Patent US3863587A successfully refreshed from Google Patents.
US3863587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-leveling and swiveling chair
Assignee: Individual
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Filing: 1972-02-25
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Granted: 1975-02-04
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Expires: 1992-02-25
Abstract
Abstract An adjustably counterweighted chair seat supported on a vertically adjustable stand, the chair seat and stand being interconnected by a ball and socket joint for providing movement therebetween in three normal axes of motion. The counterweight, adjustably mounted below the joint times the distance to the joint, exceeds the weight of the chair seat and occupant, above the joint, times the distance therebetween, to keep the chair seat level while the stand follows the roll and pitch of the ship on which it is supported. While remaining level the chair seat is also turnable about its vertical axis.
Inventors
- 👤 Angelo J Bosnich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:30
CPC Classifications
B; B63; B63B; B63B29/00; B63B29/02; B63B29/04; B63B29/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
375 words
A self-leveling and swiveling chair having a seat for a sitter and comprising: a. a shaft having oppositely disposed ends and fixed by one of said ends to said seat with the other free end depending; b. a stand having radially extending feet for engaging a deck of a ship; a tapped sleeve joining adjacent ends of said feet and forming therewith a base; a straight threaded shaft having oppositely disposed ends one of which ends is adapted to be threadably engaged in said tapped sleeve for varying the length of said threaded shaft engaged in said tapped sleeve; a dog leg sleeve having two hollow legs, one of said legs being reversely tapped with respect to said tapped sleeve and adapted to threadably engage said threaded shaft for varying the length of said threaded shaft cooperatively with said tapped sleeve when said threaded shaft is rotated; c. universal joint means having a ball and socket joint, said ball being mounted on said shaft between said seat and a counterbalancing weight and above the center of gravity of the swiveling chair, and said socket being mounted on said stand and adapted to engage said ball for relative movement therebetween about three axis of motion; d. a flat weight base fixed to the free end of said shaft for at least counterbalancing the weight of said seat when empty; e. and a plurality of flat weights for adding to said weight base for counterbalancing the weight of a sitter, each said weight having a curved radial slot defined therethrough that is adapted to engage around said shaft, said curved slot extending from a closed end at said weight''s center and extending to an open end on its periphery with said open end being angularly offset from said closed end, each said weight being separately engageable radially on said shaft through the open peripheral end of said curved slot and being turned about about its axis normal to said slot to bring said shaft to the closed center end of said curved slot, whereby said weights are added from the side to the shaft in vertical formation and prevented from slidably disengaging thErefrom inadvertently by the angular offset of the open and close-ends of said curved slots.
Claim 2
Dependent Claim
375 words
A self-leveling and swiveling chair having a seat for a sitter and comprising: a. a shaft having oppositely disposed ends and fixed by one of said ends to said seat with the other free end depending; b. a stand having radially extending feet for engaging a deck of a ship; a tapped sleeve joining adjacent ends of said feet and forming therewith a base; a straight threaded shaft having oppositely disposed ends one of which ends is adapted to be threadably engaged in said tapped sleeve for varying the length of said threaded shaft engaged in said tapped sleeve; a dog leg sleeve having two hollow legs, one of said legs being reversely tapped with respect to said tapped sleeve and adapted to threadably engage said threaded shaft for varying the length of said threaded shaft cooperatively with said tapped sleeve when said threaded shaft is rotated; c. universal joint means having a ball and socket joint, said ball being mounted on said shaft between said seat and a counterbalancing weight and above the center of gravity of the swiveling chair, and said socket being mounted on said stand and adapted to engage said ball for relative movement therebetween about three axis of motion; d. a flat weight base fixed to the free end of said shaft for at least counterbalancing the weight of said seat when empty; e. and a plurality of flat weights for adding to said weight base for counterbalancing the weight of a sitter, each said weight having a curved radial slot defined therethrough that is adapted to engage around said shaft, said curved slot extending from a closed end at said weight''s center and extending to an open end on its periphery with said open end being angularly offset from said closed end, each said weight being separately engageable radially on said shaft through the open peripheral end of said curved slot and being turned about about its axis normal to said slot to bring said shaft to the closed center end of said curved slot, whereby said weights are added from the side to the shaft in vertical formation and prevented from slidably disengaging thErefrom inadvertently by the angular offset of the open and close-ends of said curved slots.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |